import 'package:logging/logging.dart';
import 'package:relatica/models/connection.dart';
import 'package:relatica/models/direct_message_thread.dart';
import 'package:relatica/models/exec_error.dart';
import 'package:result_monad/result_monad.dart';
import 'package:riverpod_annotation/riverpod_annotation.dart';

import '../friendica_client/friendica_client.dart';
import '../friendica_client/paging_data.dart';
import '../globals.dart';
import '../models/auth/oauth_credentials.dart';
import '../models/auth/profile.dart';
import '../models/direct_message.dart';
import '../services/feature_version_checker.dart';

part 'direct_message_services.g.dart';

@Riverpod(keepAlive: true)
class DirectMessageThreadIds extends _$DirectMessageThreadIds {
  static final _logger = Logger('DirectMessageThreadIdsProvider');
  late Profile userProfile;

  @override
  List<String> build(Profile profile) {
    userProfile = profile;
    update();
    return [];
  }

  Future<void> update() async {
    final threads = <String>[];
    await DirectMessagingClient(userProfile)
        .getDirectMessages(PagingData())
        .match(
      onSuccess: (update) {
        final newThreads = DirectMessageThread.createThreads(update);
        for (final t in newThreads) {
          threads.add(t.parentUri);
          ref
              .read(directMessageThreadServiceProvider(userProfile, t.parentUri)
                  .notifier)
              .update(t);
        }
        _logger.fine(
            'Updated ${update.length} direct messages, across ${newThreads.length} threads');
      },
      onError: (error) {
        _logger.severe('Error getting direct messages: $error');
      },
    );
    state = threads;
  }

  FutureResult<DirectMessage, ExecError> newThread(
      Connection receiver, String text) async {
    if (userProfile.credentials is OAuthCredentials) {
      final result = getIt<FriendicaVersionChecker>()
          .canUseFeatureResult(RelaticaFeatures.directMessageCreation);
      if (result.isFailure) {
        return result.errorCast();
      }
    }

    final result = await DirectMessagingClient(userProfile).postDirectMessage(
      null,
      receiver.id,
      text,
    );
    result.match(onSuccess: (newMessage) {
      DirectMessageThread.createThreads([newMessage]).forEach((thread) {
        state = [...state, thread.parentUri];
        ref
            .read(directMessageThreadServiceProvider(
                    userProfile, thread.parentUri)
                .notifier)
            .update(thread);
      });
    }, onError: (error) {
      _logger.severe('Error getting direct messages: $error');
    });

    ref.invalidateSelf();
    return result.execErrorCast();
  }
}

@Riverpod(keepAlive: true)
class DirectMessageThreadService extends _$DirectMessageThreadService {
  static final _logger = Logger('DirectMessageThreadServiceProvider');
  String threadId = '';

  @override
  DirectMessageThread build(Profile profile, String id) {
    _logger.severe('build id = $id');
    threadId = id;
    state = DirectMessageThread(
      messages: [],
      participants: [],
      title: 'Uninitialized',
      parentUri: '',
    );
    return state;
  }

  void update(DirectMessageThread thread) {
    print('OldThread == NewThread? ${state == thread}');
    state = thread;
  }

  FutureResult<DirectMessage, ExecError> newReplyMessage(
      DirectMessage original, String text) async {
    if (!state.messages.contains(original)) {
      final error =
          'Message is not for this thread: ${state.parentUri}, $original';
      _logger.severe(error);
      return buildErrorResult(
        type: ErrorType.notFound,
        message: error,
      );
    }

    if (profile.credentials is OAuthCredentials) {
      final result = getIt<FriendicaVersionChecker>()
          .canUseFeatureResult(RelaticaFeatures.directMessageCreation);
      if (result.isFailure) {
        return result.errorCast();
      }
    }

    final result = await DirectMessagingClient(profile).postDirectMessage(
      original.id,
      original.senderId,
      text,
    );
    result.match(onSuccess: (newMessage) {
      state.messages.add(newMessage);
    }, onError: (error) {
      _logger.severe('Error getting direct messages: $error');
    });

    update(state);
    return result.execErrorCast();
  }

  Future<void> markMessageRead(DirectMessage m) async {
    final oldIndex = state.messages.indexOf(m);
    if (oldIndex < 0) {
      _logger.severe('Message is not for this thread: ${state.parentUri}, $m');
      return;
    }

    await DirectMessagingClient(profile).markDirectMessageRead(m).match(
      onSuccess: (updatedItem) {
        final newState = state.deepCopy();
        newState.messages[oldIndex] = updatedItem;
        update(newState);
      },
      onError: (error) {
        _logger.severe('Error getting direct messages: $error');
      },
    );
  }
}